Module bitmap

This module holds abstractions that enable tracking the areas dirtied by writes of a specified length to a given offset. In particular, this is used to track write accesses within a GuestMemoryRegion object, and the resulting bitmaps can then be aggregated to build the global view for an entire GuestMemory object.

Structs

AtomicBitmapbackend-bitmap

AtomicBitmap implements a simple bit map on the page level with test and set operations. It is page-size aware, so it converts addresses to page numbers before setting or clearing the bits.

Traits

Bitmap

Common bitmap operations. Using Higher-Rank Trait Bounds (HRTBs) to effectively define an associated type that has a lifetime parameter, without tagging the Bitmap trait with a lifetime as well.

BitmapSlice

Trait used to represent that a BitmapSlice is a Bitmap itself, but also satisfies the restriction that slices created from it have the same type as Self.

WithBitmapSlice

Trait implemented by types that support creating BitmapSlice objects.

Type Aliases

ArcSlicebackend-bitmap

A BitmapSlice implementation that uses an Arc handle to a Bitmap object.

BS

Helper type alias for referring to the BitmapSlice concrete type associated with an object B: WithBitmapSlice<'a>.

MS

Helper type alias for referring to the BitmapSlice concrete type associated with the memory regions of an object M: GuestMemory.

RefSlicebackend-bitmap

A BitmapSlice implementation that wraps a reference to a Bitmap object.